Hoisting-bucket.



A. E. MORRIS.

HOISTING BUCKET.

- APPLICATION man 1uLY15, 1912.

Patented July 3, 1917.

5 SHEETS-SHEET| fg 16 [ulg Q15 APPLICATION FILED JULY I5 1912.

A. E. NIQRms. Holsmwucxn.

APPLICATION FILED JULY I5, 15H2.

1,231 779.` .Patented July, 1917.

5 SHEETS-SHEET 4.

A. ,E,. NORRIS. HolsTmG BunKET. APPLicTloN mil? JULY 15,11912.

Patented july 3, 1917'.

5 VSHEETS--SHEE-T 5- LMON E. NORBIS, 0F CAMBRIDGE, MASSACHUSETTS.

HOISTING-BUGKET.

neaive.

Applicationlled July 15, 191.2.

To all 'whom it may concern:

Be it known that l, .Antros E. Nomos,v a citizen of the lllnited States, residing at Cambridge, county oi? Middlesex., State of Massachusetts, have invented an Improvement in Henning-Buckets; oil." which the folf lowing description, in connection with the acconipanyii'lg drawing, is a specification.

like characters on the drawing representing like parts. y f l .v y

This invention relates .to hoisting buckets or grabs ofthat type which are commonly lused in handling coal, ore, dirt and other similar" material.

One of the objectsof the invention is to provide a novel grab or hoisting bucket of this type in which. `the holding rope or cable and, the closing rope hare such a relation to each other and are so connected to the bucket that the latter will not swing or twist while the grab is beinglilpenedj' or closed. Another object of the invention is to provide a novel grab of this nature having a buling device or cushloning the opening movement of the grab and for limiting such movement so that when the grab is properly opened the' edges of the bucket seg ents will be in the 'best position to readily enter the material when thegrab is closed.U Still another ject of the invention is to improve generally grabs or liioisting buckets of this type, all as will be more fully hereinafter described and then pointed out in the appended claims.

Referring to' the drawings wherein I have illustrated some embodiments of my invention, Figure 1. is aside View of a grab elnbodying my invention;

Fig- Q a top plan view;

Fig. .3 is an end View;

Fig. 4 is an enlarged sectional view through one of the buliing devices;

Fig. 5 1s an enlarged. sectional view on substantially the line mmm, Fig. 2;

Fig. 6 isa top plan view of the weight or central member to which the bucket seg- Inents'are pivoted with a portion. thereof broken out to show the sheaves; Fig. 7 is a section on the line with the sheaves omitted;

Fie'. 8 is a side view of the device shown in Figs. 6 and T Fig. 9 is a bottomplan view of the head; Fig. 10 is a view showing the relative ar rangement of the sheaves over which the closing'rope passes ;4

Fig. 11 is a top p lan view of a bucket ses, Fie 6l Specification of Letters atent.

Serial Noi 769,392.

embodying my invention in aA different form from that shown in Figs. 1-10;

Fig- 1 2` isnan enlarged plan view of the Weight or central member of the bucket shown in Fig; 1l.

The bucket or grab herein shown is of each pivotallycoimected by links to a head to Whlch a holding rope is connected, the bucket segments being closed by means of a Patented July 3, 1917",

`that familiar' type comprising two bucket* segments pivotally `connected together and.

closing ropefwhich passes. around sheaves' carried in the head and by the bucket segments, respectively. The two bucket vsegments are designated 1 and 2, respectively, and each isA provided with the upwardlyeittendingarms 3A which are pivotally con nected at 'their upper ends to pintles Il extending from a central sheave-carryingmember 5 which receives a pluralityof sheaves 6, see Fig. 6, overwhich the opening and closing rope 10 passes. These bucket segments .also have links 7 pivoted to their upper rear `corners, the upper ends of which links "are pivotally connected to a head 8 to which the holding rope 9 isfsecured. '\The head 8 also sustains a plurality of sheaves llover which the opening and closing rope 10 passes usual in this class of devices. In grabs or hoisting buckets of this nature as heretofore made the holding rope usually'been a single rope having its lower end fastened to the head 8, said rope extending up over the trolley of the tower or other supporting de vice to the drum of the 'hoisting engine.4

The closing r`ope, on the other hand, has-y usually been a single rope which passes down through an aperture in the head and yaround the sheaves 6 and 11, the end of the rope being fastened to the head or to some other-.part of the bucket. Where this ar rangement of closing and hoisting ropes is usedthc holding rope is usually connected f to the center of the head while the closing rope is connected to the head at one side of the'center. As result when the bucket is being held by the holding rope it will hang centrally, while when the weight of the bucket is thrown onto the closing rope` as done when the bucket is being closed and is being transported, theweight comes on one side of the line of the rope. This shifting of .the weight from one. rope to the other gives the bucket a twisting tendency which, is often suilicient to interfere With the rapid operation of the bucket. In orderto, overtached to the head of the bucket, said two ends passing up over the trolley and thence to the winding drum inl usual manner.

The closing rope 10 is also in the nature of a double rope, 'both ends or strands of which lead to the bucket and pass into the head thereof on opposite sides of the bucket, i

the two strands passing up over the trolley or supporting device j' and thence to the drum of the hoisting engine in usual manner.

I will preferably make the two strands orA ends 1() parts of a continuous rope o1' cable, and the rope will simply pass down through the head and thence around the sheaves 6 andll alternately and thence up through the head again, although such a construction is not essential. l

The head 8 is provided with depending ears 12 which support a pivotal pin 13 on which the sheaves 11 are looselymounted, and the central weight or sheave-receiving member 5 `is also provided with bearings 91 in which is sustained a pin 14 on which the sheaves 6 are loosely mounted. The ropes 9 are connected at their ends to yokes 15 which in turn are detachably connected to the main poi-tion of the head 8. These yokes 15 are each provided -with two studs 16 which extend into apertures 17 formed in the head 8 and the studs 16 are locked to the head S by locking pins 18 which extend through apertures formed in the head 8 and transversely through the studs 16.4 These studs 16 also furnish the pivotal connection between the links 7 and the head,

yas clearly seen in Fig. l), said links being provided at their upper ends with eyes Wliichare situated between the yokes 15 and the head 8 and through which the studs 16 extend. The head 8 is also provided with apertures A19 through which the ropes vl() pass, and in order to take the wear between tlie i'ope and the head as the rope is paid out or taken inJ I have provided a vform of fair-leader or rope guide which involves anti-friction rollers over which the rope passes. Each rope guide comprises two pairs of rollers arrangedwith the rollers of one pair situated -at right angles to those of the other pair. As seen in Fig. 5 the. head 8 is-provided-with a recess 2O in which are joi/irnaled two ro'lls 21 between which the rope passes, said rolls 21 being ment relative to the bucket.

not employed.

journaled on pintle pins sustained in the head. Situated above the rolls 22 is another pair of rolls 23 which are arranged at right angles to the rolls These rolls 23 are journaled on pins 24 that are sustained in ears rising from the head. The two pairs of rolls 23 and 21 being situated at right angles ing through which the rope passes, as best seen in Fig. 9, and these rolls `form an antifriction bearing which will prevent the rope from contacting'with or wearing the sides of the aperture 19.

In order to prevent the bucket from twisting while it is being operated I propose to arrange the points of connection between the holding roper 9 and the yokes 15 in line with the apertures 19 through which the ropes 10 pass, as will be clearly seen from Fig. 2. Moreover, I propose to place the two ropes 9 outside of the ropes 10 and equal distances therefrom so that to each other form an open` the ropes will have a symmetrical arrange- With this construction it will be seen that the center of gravity of the bucket whether load( l or empty will always come vmidway between the ropes 9 or the ropes l0, and that as a vconsequence the changing of the weight from the holding ropes 9 to the opening and closing -ropeslO or vice versa will not 'throw the weight out of alinement with the suspending means. The bucket, therefore, will not tend to twist as would be the case if this symmetrical arrangement was Moreover, by reason of the fact vthat the holding rope 9 and the closing rope l0 both have connection with the bucket at two points the bucket is held more steadily and with much less liability to turn around a vertical axis and thereby twist up the ropes or cables.

The arms 3 of the bucket segments are each provided with gear teeth 26 which mesh with each other, Athus insuring that the bucket segments will open and close in unison. In buckets of this type as heretofore uiaderit has not been customary to provide any stops to limit the opening movement of the bucket segments, and when the bucket is opened and dropped onto the pile of material to be moved the lips of the bucket seg ments swing back so fai' that sometimes they do not bite into the material well when the bucket is closed. The bucket will bite into and enter the'niaterial best if the bucket ysegments are opened about to the dotted -1 through the holder I the bucket or V32 that is sustained in the holder 28. This buffer 32 has a shoulder B3 against which the collar 3l enga ges and it projects beyond the end'of the holder 28. The bulfer is formed with a stern which extends nuts 35 thereon which limit the extent to which the buffer projects through the holderv or carrier 28. When the bucket is opened, as shown in Fig. .l y into `alinemenu; with each other and the two buffers 32 meet each other thereby limiting the operating movement of the bucket segments. Since the buii'ers are yieldingly sustained they operate not 'only to limit the opening movement of the segments, but they also cushion such opening movement and thus prevent any injury to the parts. It will be remembered that the central member 5 is quite heavy, hence the necessity of the cushioning action, for when the bucket .is pen this weighted member 5 does not rest on the material which is being handled, but.

is held in the position show-n in Fig. 1 by the engagement of the stops with each other. In Figs. l to 1G a construction is shown wherein the ropes 8 and 9 are in line with each-.other in a direction extending transversely of the bucket. My invention 4may also be employed in a construction wherein these ropes will be in line with each other in a direction extending longitudinally of at right angles to' that shown in Fig.' 2. Tuch a construction would merely involve shifting the position'of the pulleys 6 and ll through an angle of 90C'. In 11 and l2` I have shown this latter construction, `the construct-ion shown in these figures being substantially the same as that above cescribed with the exception that the ropes 9 and l0 are inline with each other in a direction extending longitudinally of the bucket segments.,

Although I have shown my invention as embodied in a type of bucket wherein the two bucket .segments are pivoted to turn about sc'i'mrate axes, yetit will be obvious that the invention may be readil y applied to other types of buckets.

I have herein used .the 'terms rope and closing'rope holding whichit is opened and eiosed. In the illusing'rope coir.,n'ises tufo ends or strands and similarly the closing rope comprises fili-mee by the terms twoY ends or strands l0.

rope as used holding rope and ,closing 28 and has the adjusting v the holders 28 swing around i toindicate the connection by which the bucket is held and by in the appended claims Ldo not wish to be limited to a single strand or end, but intend to include the entire connection, whether of one or more strands or ends, which performs the holding or opening and closing function. The holding rope andthe' ,yfelosing rope may be of any suitable mate- `rial. adapted for the purpose.

One advantage of the construction herein shown is that 'the Weight on the two ends of the closing rope will be automatically equalized, for if during the operation of the bucket one of the ends of the closing rope y 10 becomes longer' than the other, the extra strain on the shorter end will draw said -end through. the sheaves and `will thus equalize the strainv on the two ends. It Will be obvious that the heavy strain of lifting the load and transferring it comes on the closing ro ne and not on the holding rope and in buc ets of the large sizes it becomes-exceedingly important to equalize the strain on the two ends of the opening and closing4 i rope.

While I have herein shown some embodiments of my invention I do not wish to be limited to the constructional features shown.

Having .fully described .my invention, what I claim as new and desire to secure by Letters Patent is Y -1. In a hoisting bucket, .the combination with a head having apertures in each of two opposite sides, of two 'yokes each having studs extending therefrom and entering said apertures in the head, locking 'pins extending transversely through these studs for locking them to the head, `pivotally connected i bucket segments, links pivotally mounted on said studs and connected to said bucket segments and a holding rope having two ends, one iixedly secured to each yoke.

2. In a hoisting Bucket, the combination with a head comprising a central member having apertures and yokes at each sidel of' the head' provided with studs which enter said apertures, of two bucket segments, iinlts pivotally connected to said b uc et segments and to said studs,v a closing rope operatively, 'connected to the bucketV seg.- ments, and a holding rope comprising two ends, one fastened to each of said yokes.

. 3. IIn a hoisting bucket, the combination with two bucket segments, each having upwardly-directed arms, of a projection extending laterally from each arm, a buffer device on the-end of each projection, each buffer device comprising an elongated casing extending rearwardly from the'pr ')]'ec tion substantially parallel to the corresponding bucket arm, a buffer element slidabiy mounted in each casingr and projectn v yifvardly-directed arms, of

devices on one Segment being situated to be engaged by those on the other'segment when the bucket is fully opened..

4, In a hoisting' bucket, the combination with two bucket Segmente, each having upe member to which Suid arms :tre pivotelly connected, 'a p'r0- jection extending laterally from each arm ine direction at right angles to the axial line ofthe pivotal connection between said erm and said member, and e buffer device carried on the end of each, projection, said buffer devices being so situated relative to each other that those onthe a/rms of one bucket segment will engage those on the 15 arms of the other bucket segment when the bucket is fully opened.

In testimony whereof, I have signed my name to this specification, in the presence of two subscribingr Witnesses.

l ALB'ION E. NORRIS.

-W itnesses Lotus C. SMITH, THOMAS J'. DRUM'MOND. 

